Early
evidence
showing
striking
similarities
between
regions
on
opposite
sides
of
vast
oceans
suggested
that
in
Earth's
distant
past
what
are
now
separate
continents
may
once
have
been
connected.
However,
this
evidence
said
nothing
about
how
the
continents
could
have
moved
to
their
present
positions.
This
video
shows
how
seafloor
spreading
creates
new
oceanic
crust
and
how
the
crust
is
destroyed
by
...
Full description.

This site is part of GeoNet Internet Geography, a resource for pre-collegiate British geography students and their instructors. This page focuses on the structure of the Earth and the theory of plate tectonics, including continental drift, plate boundaries, the Ring of Fire, and mountains.
Full description.

This Enchanted Learning website offers an all-ages description of plate tectonics. The site contains nice, colorful visualizations and clear complete explanations of all parts of plate tectonics. The site also contains activities and web links related to plate tectonics. Users may also follow links to other pages within the Enchanted Learning Earth website.
Full description.

This
interactive
site
uses
illustrations
and
photographs
along
with
text
to
explain
the
movement
of
tectonic
plates
and
the
result
of
this
movement
on
the
surface
of
the
Earth.
There
is
a
detailed
discussion
of
the
movement
at
each
of
the
four
types
of
plate
boundaries:
divergent,
convergent,
transform,
and
plate
boundary
zones.
Both
lateral
and
vertical
movements
are
depicted
by
maps
and
diagrams
...
Full description.

This
is
the
web
page
for
PLATES,
a
program
of
research
into
platetectonic
and
geologic
reconstructions
at
the
University
of
Texas
at
Austin
Institute
for
Geophysics.
The
page
contains
links
to
a
brief
overview
of
plate
tectonics
and
plate
reconstructions
using
the
PLATES
Project's
global
plate
reconstruction
model,
in
addition
to
movies
in
the
format
of
powerpoint
animations
which
can
be
downloaded
...
Full description.

This
is
a
brief
overview
of
the
Theory
of
Plate
Tectonics.
According
to
the
theory,
the
Earth's
surface
layer,
or
lithosphere,
consists
of
seven
large
and
18
smaller
plates
that
move
and
interact
in
various
ways.
Along
their
boundaries,
they
converge,
diverge,
and
slip
past
one
another,
creating
the
Earth's
seismic
and
volcanic
activities.
These
plates
lie
atop
a
layer
of
partly
molten
rock
called
...
Full description.

This
activity
uses
the
free
software
'Seismic
Eruption'
to
visualize
seismicity
and
volcanic
activity
in
space
and
time
and
to
explore
the
relationship
of
earthquakes
and
volcanic
activiy
to
plate
tectonics.
Students
run
simulations
on
the
Pacific
coasts
of
South
America
and
California
and
the
mid-oceanic
ridge
in
the
Atlantic
Ocean,
answer
questions,
and
construct
a
cross-section.
A
link
to
download
...
Full description.

The
Great
Rift
Valley
is
a
huge
gash
cut
into
East
Africa,
extending
3000
kilometers
from
Malawi
in
southern
Africa
to
the
Red
Sea
in
the
north.
Beneath
the
Great
Rift
Valley,
the
next
new
ocean
on
Earth
may
be
forming.
This
radio
broadcast
ptovides
interviews
with
geologists
who
are
studying
this
part
of
Africa
to
learn
how
new
seas
appear.
The
tectonic
plates
that
form
the
continents
drift
continuously
...
Full description.

This
demonstration
shows
how
the
Earth's
magnetic
field
has
flipped
(the
N
pole
becoming
the
S
pole,
and
vice
versa)
many
times
through
geological
time.
It
also
demonstrates
that
as
tectonic
plates
move
apart,
new
rock
is
formed
and
locks
in
the
direction
of
the
magnetic
field
at
the
time.
Students
should
realize
that
the
discovery
of
stripes
of
alternately
normal
and
reversed-magnetized
rocks
forming
...
Full description.

The
PALEOMAP
Project
illustrates
the
platetectonic
development
of
the
ocean
basins
and
continents,
as
well
as
the
changing
distribution
of
land
and
sea
during
the
past
1100
million
years.
The
reconstruction
of
paleoclimates
is
also
discussed.
Maps
are
viewed
as
animations
where
the
time
component
can
be
user-manipulated.
Included
are
a
variety
of
background
materials
which
supplement
the
animations.
...
Full description.

Grade level:
Intermediate (3-5), Middle (6-8), High (9-12), College (13-14), College (15-16), Informal, General public